Tohban Report 2017-01-18

Tohban Reports
Start Date:	11 January 2017
End Date:	18 January 2017
Tohban:	Jim McTiernan
Tohban email:	jimm@ssl.berkeley.edu
Next Tohban:	TBD
List all reports

Solar Activity

Quiet Sun:

How many GOES flares occurred?

 Flares above B, C, M, X class were     18     1     0     0

And how many of these are listed in the RHESSI flare list?

 Flares above B, C, M, X class were      3     1     0     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      2     0     0     0

There were RHESSI flares/GOES flares 6 / 19 over the time range 10-Jan-17 17-Jan-17

Memory Management

Decimation was normal/vigorous for the full time period, with the SSR at about 0% at the end of each day's BGS contacts.

Spacecraft Status

Detectors 3 and 8 are recording events. The cold tips are 127.8 and 125.9 K as of 17-Jan-2017. The cold plates, 1 and 2 are 152.5 and 151.0 K. Cryocooler power is steady at 75W, cryocooler efficiencies are 0.0271 to 0.0275. Cryocooler transients have calmed down, with a standard deviation of approximately 0.5 degree in the daily average cold tip temperatures (historically this values is typically 0.25 to 0.30, but has been as large as 1.0 recently). See:

http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures.pdf

for a summary plot of recent temperatures, efficiencies and accelerometer values.

Attenuators are both commanded to be out.

Data Gaps

None:

DATA GAPS FOR 2017/01/11

TIME RANGE: 2017-01-11T00:00:00.000 -- 2017-01-12T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2017/01/12

TIME RANGE: 2017-01-12T00:00:00.000 -- 2017-01-13T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2017/01/13

TIME RANGE: 2017-01-13T00:00:00.000 -- 2017-01-14T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2017/01/14

TIME RANGE: 2017-01-14T00:00:00.000 -- 2017-01-15T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2017/01/15

TIME RANGE: 2017-01-15T00:00:00.000 -- 2017-01-16T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2017/01/16

TIME RANGE: 2017-01-16T00:00:00.000 -- 2017-01-17T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2017/01/17

TIME RANGE: 2017-01-17T00:00:00.000 -- 2017-01-18T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

Detector issues

On 12-jan-2017 17:00, the cryocooler power was temporarily dropped to 70 W. This was increased back to 75 W after a short time, when the cold tip temperatures jumped.

Detectors 3 and 8 are powered on, and are recording events. On 2017-017, detector 9 was turned off and detector 8 turned on:

2017-017-18:36:35 /ihvdac detector=9, voltage=0
2017-017-18:38:21 start idib_single_off(9)

2017-017-18:38:37 start idib_on_g8
2017-017-18:39:29 start ihv_ramp_stage1_g8 ; 171 V

2017-017-20:14:00 start ihv_ramp_stage2_g8 ; 1000 V

2017-017-21:52:46 start ihv_ramp_stage3_g8 ; 2000 V

2017-017-23:32:39 start ihv_ramp_stage4_g8 ; 3000 V

2017-017-23:39:40 /IDPUTABLE8 OFFSET=FRONTSLOWDAC
2017-017-23:39:56 /IDPULOAD VALUE=0x15 ; was 0x0C

2017-018-01:14:25 /IDPUTABLE8 OFFSET=FRONTFASTDAC
2017-018-01:14:31 /IDPULOAD VALUE=0x60 ; was 0x40

2017-018-01:15:22 /IDPUTABLE8 OFFSET=FRONTSLOWDAC
2017-018-01:15:28 /IDPULOAD VALUE=0x1C ; was 0x15

Spacecraft Management

Decimation	Normal/Vigorous
HLAT Decimation	Rear decimation
Night time data (fronts)	plus/minus 4 minutes from daylight
Night time data (rears)	plus/minus 4 minutes from daylight
Require extra passes?	No
Requirement for moving pointer?	No
Attenuator operation	Commanded out
Detector problems?	See notes above.